It is actually not too difficult to make GIF
animations; you can either use Adobe Photoshop or some GIFs creator programs.
Nowadays, good news, you can even make GIFs with your smart phones! GifBoom app
for example!

GifBoom app offers you an easy way to create
GIFs from your smart phones. You can either take photos and directly create animated-GIFs
out of it, or convert the funny videos that you took into GIF format. This
application also has a community, where you can share your new-made-GIF with
others who have the application. Just like Instagram, let’s say. I recently
tried it and now I am madly in love with making GIFs pictures. Too bad I cannot
share them because Facebook does not support GIF format pictures!

GifBoom app

Anyway, you can check out more GIFs on the youtube-to-GIF
site, gifsoup, or some other nice (mainly hilarious) GIF pages: